Sun: Introduction: The star at the center of the Solar System is the Sun. Its core undergoes nuclear fusion events, transforming it into a nearly perfect ball of hot plasma that is incandescent. The Sun is the most significant source of energy for life on Earth, radiating this energy mostly as light, ultraviolet, and infrared radiation. Sun The Sun's radius is around 109 times greater than that of the Earth at 695,000 kilometers (432,000 miles). Its mass is approximately 330,000 times that of the Earth and accounts for 99.86% of the solar system's total mass. About 73% of the mass of the Sun is made up of hydrogen; the remaining 25% is largely helium, with much lesser amounts of heavier elements including oxygen, carbon, neon, and iron. A G-type main-sequence star, the Sun (G2V). Consequently, it is described to informally and inaccurately as a yellow dwarf (its light is actually white). It was created around 4.6 billion years ago when a portion of a massive molecula...
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